People Who Have Done Research on This Subject:
Hubbard, Alfred (later claimed that the "free energy" device that drove the boat in the 1919 demonstration in Seattle was a device that converted radioactivity to electricity. Shortly after that he began working at the Radium Chemical Company in Pitsburgh and then New York. This company purchased at least a 50% interest in the device around 1920. He got a patent for it: #1,723,422, called Atmospheric Power Generator;